Furnace.



No. 759,002. PATBNTED MAY 3, 1904.

J. MURPHY. FURNACE.

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No. 759,002. PATENTED MAY 3, 1904. J. MURPHY. FURNACE.

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FURNACE.

APPLIUATION rmm NOV. a1, 1903, N0 MQDEL. SBEEETS-SHEET a,

5 vwewfoz llurrun Srarrzs Patented May 3, 1904.

ArENT OFFICE.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 759,002, dated May 3,1904.

Application filed November 21,1903. Serial No. 182,187. lNe model.)

To all 1071/0711 it may concern:

Be it known that I, J AM ES MURPHY, a citizen of the United States,residing at Chicago, in the county of Cool: and State of Illinois, haveinvented new and useful Improvements in Furnaces, of which the followingis aspecilication.

My invention relates to improvements in boiler-furnaces of that kind andconstruction particularly adapted for consuming the gases and smokearising in the process of combustion of the fuel usually used in theutilization of such furnaces; and the object is to simplify and perfectthe adjunct and appliances for the introduction of air to combine withthe gases, smoke, and unconsumed products of the fuel.

The improvements embody a furnace provided with air-induction pipesleading from the combustion-chamber into the bridge-wall, thence to therear of the fuel-chamber or firepot, and side air-pipes leading from thehollow ln'idge-wall into the front of the fire pot or chamber, all aswill be hereinafter fully described and the asserted novelty thenparticularly pointed out and distinctly claimed.

1 have fully and clearly illustrated my improvements in the accompanyingdrawings, to be taken as a part of this specification, and wherein thesame parts appearing in the several illustrations are designated by thesame notations, and reference beinghad to the drawings, Figure 1 is aside elevation of a furnace, partly in longitudinal central verticalsection, showing the boiler in position. Fig. 2 is a horizontal sectionthrough the furnace, taken on the line 2 2 of Fig. 1. Fig. 3 is avertical transverse section through the furnace, taken on the line 3 3of Fig. 1. Fig. 4 is a vertical transverse section through the furnace,taken on the line 4 L of Fig. 1.

A designates the boiler set on and supported by suitable masonry in anyproper manner and of any construction and capacity required to meet thedemands of the furnace.

B designates the rear wall of the furnace, having an overhanging arch 1,extending to the boiler. The space between the inner :face of the rearwall and the-end of the boiler constitutes a flue to carry the heat tothe fines of the boiler and thence to the flue in front of ill! USLliLl11121111161.

C designates the combustion-ehamber.

D is the front wall, which supports the front end of the boiler and isthe separating masonry work between the flue at the front of the boilerand the lirc'chamber.

E is the fire or fuel chamber, F the gratebars, and G is the ash-pit.The flue in front of the boiler, the fire or fuel chamber, and theash-pit are all closed by doors 2 3 4C, substantially as shown. Theseparts and elements may all be of the usual constructions and arrangementand do not form part of my present lI'UPl'OVOlTlQhlJS, except as theymay make up or constitute parts of combinations with those of myinvention.

Proceeding now to describe the elements directly forming theinnirovements involved in my invention, 5 designates the bridge-wall ofthe furnace, extending between the side walls 6 7 of the furnace andbuilt up to the right height, closing the rear of the ashpit andextending vertically at the rear end of the ire-chamber, substal'itiallyas shown. In that part of the bridge-wall at the end of the fire-chamberare formed a plurality of horizontal passages 8, through which air fromthe outside coming through the main air-flue is projected into thefire-chamber. The bridgewall is made hollow at its rear, as at 9, thechamber or hollow being closed at the top, as indicated, so that the airadmitted cannot escape at that end of the chamber. The air is admittedto the chamber 9 at the base through a suitable pipe or conduit 10,which opens through the base of the rear wall of the furnace, as shownin Fig. 1 of the drawings.

To the rear of the bridge-wall 5 at aproper distance is positioned adeflecting-arch 11, built across between the side walls and supported bythem and extending downward such a distance as to be encountered by theprogressing flames from the lire-chamber, whereby they are turneddownward in their course to impinge and act upon the air-conduit 10, andthus heat the incoming current of air through that member.

At the top of the bridge-wall, opening frony the chamber therein andlaid horizontally in forward direction, are two air-pipes 1Q 13 atopposite sides of the lire-chamber and opening at their front ends downthrough the wall 1) into the front part of the tire-chamber,substantially as shown, so as to convey air from the chamber 9 in thebridge-wall 5 and deliver it to the front part of the fire-chamber topromotecombustion from that direction. These air-pipes 12 13 may beconcealed in the masonry of the side walls of the furnace and open intothe fire-chamber at their front ends through either the side walls orthrough the wallD.

The operation of the furnace may be stated as follows: The fire in thefire-chamber having been started, the draft carries the heat and flameupward and over the bridge, thence down under the deflecting-wall 11,and thence through the combustion-chamber upward through the boiler. Aportion of the heat in its entrance to the combustion-chamber is castdown onto the air-conduit 10, and thus heats the incoming air, whichrushes up through the chamber 9 and is fed to the fire-chamber throughthe passages 8. At the same time the warm air is carried through theside pipes 12 13 and fed to the fire-chamber at the front.

Thus it will be perceived that air is delivered hot at both the rear andthe front of the firechambcr, creating such perfect combustion by mixingwith the generated gases. and smoke as to consume them, so that a clearand intense caloric current passes through the combustion-chamber to theboiler.

Having thus fully described my invention, what I claim as new is In afurnace, a bridge-wall formed with a vertical chamber having a pluralityof passages lead in g therethrough into the fire-chamber andcommunicating with said Vertical chamber, side pipes leading from thechamber in the bridge-wall and communicating at their forwardextremities with the front portion of the fire-chamber, an air-conduitopening through the rear wall of the furnace and communicating with thelower terminal of the vertical chamber in the bridge-wall, and adepending deflecting-wall across the combustion-chamber in rear of andadjacent to the said vertical chamber in the bridge-wall.

JAMES MURPHY.

\Vitnesses:

G. H. Lonnn, T. D. FULLER.

